Square-Taper Bottom Brackets

The square taper bottom bracket is the traditional "cotterless" bottom bracket. Now sold as sealed cartridge units, they're economical and reliable.

Shimano BB-UN26 68 x 110mm

81211
!
Sealed cartridge bottom bracket at a surprisingly low price.

For 68mm bottom bracket shell. English threads. Supplied without crank bolts - you'll need to reuse your old ones. Weight (117mm axle length): 325g. Shipping Weight: 350g.

Shimano BB-UN26 68 x 113mm

2827
!
Sealed cartridge bottom bracket at a surprisingly low price.

For 68mm bottom bracket shell. English threads. Supplied without crank bolts - you'll need to reuse your old ones. Weight (117mm axle length): 325g. Shipping Weight: 350g.

Shimano BB-UN26 68 x 117mm

2556
!
Sealed cartridge bottom bracket at a surprisingly low price.

For 68mm bottom bracket shell. English threads. Supplied without crank bolts - you'll need to reuse your old ones. Weight (117mm axle length): 325g. Shipping Weight: 350g.

Shimano BB-UN26 68 x 117mm E-Type

2400
!
Sealed cartridge bottom bracket at a surprisingly low price.

For 68mm bottom bracket shell and a bottom bracket mounted front derailleur. English threads. Supplied without crank bolts - you'll need to reuse your old ones. Weight (117mm axle length): 325g. Shipping Weight: 350g.

Shimano BB-UN26 68 x 122mm

2582
!
Sealed cartridge bottom bracket at a surprisingly low price.

For 68mm bottom bracket shell. English threads. Supplied without crank bolts - you'll need to reuse your old ones. Weight (117mm axle length): 325g. Shipping Weight: 350g.

Shimano BB-UN26 68 x 123mm

2494
!
Sealed cartridge bottom bracket at a surprisingly low price.

For 68mm bottom bracket shell. English threads. Supplied without crank bolts - you'll need to reuse your old ones. Weight (117mm axle length): 325g. Shipping Weight: 350g.

Shimano BB-UN26 73 x 110mm

2373
!
Sealed cartridge bottom bracket at a surprisingly low price.

For 73mm bottom bracket shell. English threads. Supplied without crank bolts - you'll need to reuse your old ones. Weight (117mm axle length): 325g. Shipping Weight: 350g.

Shimano BB-UN26 73 x 113mm

2374
!
Sealed cartridge bottom bracket at a surprisingly low price.

For 73mm bottom bracket shell. English threads. Supplied without crank bolts - you'll need to reuse your old ones. Weight (117mm axle length): 325g. Shipping Weight: 350g.

Shimano BB-UN55 68 x 110mm

1013
!
Square taper bottom bracket with top quality bearings.

For 68mm bottom bracket shell. Axle Length: 110mm. English threads. Crank bolts NOT included (so keep your old ones).

Shipping Weight: 360g.

Shimano BB-UN55 68 x 113mm

90395
!
Square taper bottom bracket with top quality bearings.

For 68mm wide bottom bracket shell. English threads. Crank bolts NOT included (so keep your old ones). Axle protrusion from frame: Right Side 22.5mm, Left Side 23.5mm (Axle measures at 114mm). Weight: 295g. Shipping Weight: 358g.

Shimano BB-UN55 68 x 115mm

1222
!
Square taper bottom bracket with top quality bearings.

For 68mm bottom bracket shell. Axle Length: 115mm. English threads. Crank bolts NOT included (so keep your old ones).

Shipping Weight: 360g.

Shimano BB-UN55 68 x 118mm

1077
!
Square taper bottom bracket with top quality bearings.

For 68mm bottom bracket shell. Axle Length: 118mm. English threads. Crank bolts NOT included (so keep your old ones).

Shipping Weight: 360g.

Shimano BB-UN55 68 x 122mm

90619
!
Square taper bottom bracket with top quality bearings.

For 68mm bottom bracket shell. English threads. Crank bolts NOT included (so keep your old ones). Shipping Weight: 360g.

Shimano BB-UN55 68 x 127mm

90780
!
Square taper bottom bracket with top quality bearings.
For 68mm bottom bracket shell. English threads. Crank bolts NOT included (so keep your old ones). Shipping Weight: 360g.

Shimano BB-UN55 73 x 122mm

90309
!
Square taper bottom bracket with top quality bearings.

For 73mm wide bottom bracket shell. English threads. Crank bolts included (14mm head, not allen type). Axle protrusion from frame: Right Side 25.5mm, Left Side 24.5mm. (Axle measures at 123mm). Shipping Weight: 407g.